A corpora



Jan. 12 1926,

1,569,538 s. DANILOFF ET! AL KNOCK-OFF MOTION FOR TWISTING MACHINES Filed June. 23, 1922 3 Sheets-Sheet 1 l'mwnlors: Sergeflmdoffi Clwsa balsEDupee,

Jan. 12 1926. 1,569,538

5. DANILOFF ET AL KNOCK-OFF MOTION FOR TWISTING MACHINES Filed June 25, 1922 5 Sheets-Sheet 2 Fig. 2.

liwenions': Serge Dam'loff, Charlas'flDupec,

Jan. 12 1926. 1,569,538

5. DANILOFF ET AL KNOCK-OFF MOTION FOR TWISTING MACHINES Filed June 23, 1922 3 Sheets-Sheet 3 Jcrgefiaidlaff, CharZasEfiupee,

Patented Jan. 12, 1926. 1

UNITED STATES PATENT OFFICE.

SERGE DANILOFF AND CHARIiES FRANKLIN DUPEE, OF LOWELL, MASSACHUSETTS,

ASSIGNORS TO SACO-LOWELL EiHOPS, 9T! LOWELL, MASSACHUSETTS, A COR?ORA- TION. OF MASSACHUSETTS:-

KN'OCK'OFF MOTION FOR T'WISTING MACHINES.

Application filed June 23,

To (ZZZ whom it may concern:

Be it known that we, Snnen DANILO'FF, a citizen of Russia, and tli l'aanns FnaNKLiN DUPIGIC, a citizen of the United States both residents of Lowell in the county of h liddlesex and Commonwealth of h lassachusetts, have jointly invented certain new and useful I]l'l1)1'()VQHl0l1tS in Knock-Oil Motions for Twisting Machines, of which the following is a specification.

The object of our invention is to provide a simple knock-otl motion suitable for twisters and similar machines that will operate positively and with precision to stop the machine at a predetermined moment. In such a machine as a twister for example our knock-oft motion operates to stop the machine when a predetermined yardage of the yarn has been delivered through the front rolls. By our new invention this can be accomplished with precision by mechanism which is simple in construrtion and operation and which will operate to stop the machine only at the predetermined moment even though the machine is subject meanwhile to jars or rough usage such machines are commoiiily subject to in the ordi nary nnuiuitacturing plant.

To this end our invention consists in the construction of which a preferred embodiment is shown in the acrompanying drawings as applied to a twisting machine. Changes in form and proportions to adapt our invention to machines or parts thereof of different constructions may be resorted to without departing from our invention as set forth in the appended claims.

1n the drawings,

Fig. 1 is a front elevation of certain portions of the mechanism as applied to the frame of a twisting machine.

Fig. is a side view in elevation of the mechanism of Fig. 1.

Fig. 3 is an elevation of the interior of the hank clock showing the knockoff disk,

knoaak-o'tl lever and cooperating parts.

-. t is a CI'Of-J'S'HQBCUOD on lines i -at,

ii is a ti'l'tli'ifi-Stl ftltfil on lines 5 Fig. 5

i and portions of the frame of a twisting machine of usual. and wellknown construction. As shown in the drawings the 1922. Serial No. 570,413.

machine is actuated in the usual manner by belt 3 and tight and loose pulleys 4, although an electric motor or other source of power may be substituted therefor.

The lower front roll, commonly known as the driving roll, is shown at 5 and is revolved by connecting mechanism not here shown.

6 is a hank clock of well known construction. Roll 5, through worm 7, gear 8, worm 9, gear 10 and gear 10 (10 and 10 being fast on the same shaft 10) revolves gear 11 (Fig. 8) in a well known manner. Gears 1() and 10 are carried on bracket 12 adjustably pivoted at 13 so that gear 10 can be moved from engagement with worm 9 at will. Mounted on the hub lt of gear 11 (Fig. i) is the disk 15 which is driven by gear 11 b means of pin 16 which fits into the bottom of a slot 17 in. disk 15 as shownv clearly in Fig. 4.

As is well known the yarn is delivered at the surface speed imparted to it by the lower front or driving roll 5 and therefore with a driving roll of known circumference one can determine the precise number of revolutions of the driving roll necessary to deliver a desired yardage of yarn. By properly proportioning the worms and gears in the train of mechanism between the driving roll 5 and the disk 15, the disk 15 will make one complete revolution for the number of revolutions of the driving roll necessary to deliver the desired yardage of yarn. It is the function of the knock-off mechanism to stop the machine when this desired yardage has been delivered which in the mechanism here shown will be when the disk 15, controlled by a train of properly proportioned gears and worms, or other actuating mechanism, hasmade one complete revolution.

Pivoted in the hank clock 6 at 18 is the knockoff lever 19 with the depending de tent 20 which normally rides on the circumference of disk 15 as the disk revolves. Disk 15 is provided with hub 21 which fits over hub 1 1 of gear 11. In the front face of disk 15 is a recess which encircles hub 21 as shown in dotted lines. Fig. 8, and which has radial section Rotatably mounted on hub 21 and within said recess is dog 23 which can be rotated about hub 21 within the limits of said recess 22. Dog 23 carries pin 2'1 against which bears the end of spiral spring 25 which is contained in a cylindrical passage 26 provided within the disk. The portion of the passage 26 on which recess 22 opens on one side forms slot 27 in which slides pin 2% of dog 23. The spring normally holds dog 23 in the position shown in Fig. 3, the dog .3 covering slot 17 at the front. The disk revolves in a clockwise direction. The dog 23 has on its top surface a slight projection 28 which projects slightly above the circumference of disk 1.5. The top surface of the dog has also a slight boss at 29 which curves into a depression at 30, just back of the projection 28. The dog 23 is held on hub 21 by a washer 31.

The bottom of detent 20 is formed as shown in Figs. 3 and 5 with two surfaces 32 and 33 pointing in opposite directions, each tak: ing up substantially one-half of the wldtlrof the disk 15. Surface is flat with a kmfe edge 3 1 which forms the line of contact between the detent and the circumference of the disk. Surface points in the opposite direction and its bottom edge at its lowermost point is slightly above the top of the disk and does not contact with it as the disk revolves.

35 (Fig. 1) is the usual shipper handle which through rod 36 and yoke 37 can move shipper rod 38 either to the right or left to stop or start the machine by shifting belt 3 or otherwise connecting or disconnecting the source of power. 39 is a spring on the shipper rod, the purpose of which will be hereinafter set forth.

Depending from the free end of knock-off lever 19 is the connecting rod alt) (Fig. 3) which co-operates with the cross-shaft 41 through the lever 1-2. Cross-shaft 11 car ries lever 43 from which depends the vertical rod td which is fast at 45 to the latch lever 16 pivoted at M. Vertical rod l l carries at its lower end, below latch lever 16, the weight 48.

Fastened to the shipper rod by any adequate means such the arms 4-9 and is the slide 51 with the cam face The end (Fig. 1) of latch lever 16 is normally in the position shown in Fig. 2, out of engagement with the slide 51.

Below the shipper rod (see Fig. 1) is the latch rod 5st with bearings at 55 and 56. At 57 is a forked arm fast on the latch rod which normally engages the collar 58 fast on the shipper rod. Between the bearing 55 and the forked arm 57 is the spring 58. At 59 is a stop collar and at 60 the latch rod is cut away forming a reduced portion with a shoulder at 61. Y The collar 59 is a safety device to prevent the latch rod 54 from flying out under the influence of its spring in case the latch 62 or the collar 58 be removed for repairs. Carried on the latch lever 16 is the upwardly projecting latch 62 which normally, when the machine is running, engages the shoulder 61 of the latch rod 5% as shown in Fig. 1, thereby holding the latch rod from moving to the right under the pressure of spring 58.

The operation of the machine is a follows. With the parts in the position shown in Fig. 1 the machine will be running and the disk 15 will revolve slowly in a clockwise direction with the edge 34 of surface of detent 20 of knock-off lever 19 riding on its circumference. lVhen the disk gets to the position shown in Fig. 3 the edge of surface 33 of detent 20 will come in contact with the projection 28 on the top surface of dog 23, and as the disk continues to revolve will push the dog to the left against the pressure of spring 25, the edge 3 1 of detent 2O continuing to bear on the circumference of the disk. \i hen the disk 15 has revolved sufficiently the dog 23 will be so far retracted as to completely uncover slot 17 and simultaneously the edge 31f of detent 20 will. ride over the edge of said. slot and the detent will be free to drop into the slot. Through weight 1-8, rod 1%, cross-shaft 4:1 and rod 10 the knock-elf lever 19 will drop positively and instantaneously into slot 17 when the dog is retracted and the knife edge 34 passes over th edge of slot 17. lVeight 18 also causes the latch. lever 46 to swing on its pivot 4-7, disengaging latch (52 with shoulder 61 of the latch rod 5 1, which under the influence of the spring 55 will move to the right (Fig. 1) carrying with it through forked arm 57 and collar 58 the shipper rod 38, to shift the belt. It will be noticed that th unlocking of the latch rod is instantaneous, that it is at all times securely and completely locked until the knock-off lever is actuated, and that the parts are so organized that the knock-off lever will drop positively and. instantaneously at the predetermined moment and only then.

To start the machine again the shipper handle 35 is manipulated, moving the shipper rod to the left, causing compression of spring 39 and thereby shifting the belt from the loose pulley to the tight pulley. Through collar 58 and forked arm 57 the latch rod 5 1 is thereby also moved to the left compressing spring 58 and bringing the cut-away portion 60 of the latch rod into the position shown in Fig. 1, with the shoulder 61 of latch rod 54 just beyond and to the left of the latch 62. Simultaneously the slide 51 moves to the left with the shipper rod, and the end of latch lever 46 will ride up on cam face 52 as the slide moves to the left, thereby bringing latch in the way of shoulder 61 and lifting against the downward pull of weight 48 the connecting rod 44: which through shaft 41 and rod a l) swings the knock-off lever 19 upward and carries the detent .20 out of slot 17 in the Jill) disk 15. When the detent is raised out of slot 17 the dog 23 is swung by spring 25 into its original position, as shown in Fig. 3, again covering slot 17 at the front. The disk 15 having revolved only slightly from its position shown in Fig. 3 before the dropping of the knock-off lever to stop the machine, the dog 23 will swing back to a position directly under the detent 20. When the shipper handle is released by the operator the spring 58 will move latch rod 5 k and through forked arm 57 and collar 58 the shipper rod to the right until the latch rod is locked against further motion by latch (32 engaging shoulder (31. The shipper rod will then be further moved a short distance to the right by the expansion of auxiliary spring 39 carrying with it the slide 51 so that the end of the latch lever 16 will pass out of engagement with the cam face As the end of latch lever 46 passes from engagement with cam face 52 it will tend to drop under the pull of weight 48, until its motion is arrested by detent 20 coming into contact with the top surface of dog 23. The engagement of detent 20 with the top surface of dog 23' will. hold the knock-off lever and latch lever from further downward motion. and the latch. rod from further lateral inotioniuntil the disk has made another complete revolution and permitted detent 20 to again drop into slot 17. The end of latch lever 46 will reniiain balanced over the slide 51 at a sufficient distance to permit it to drop freely when the detent 20 again enters the slot 17 on the next revolution of disk 15 to stop the machine. The auxiliary spring 39 will carry the shipper rod to the right far enough to properly set the knock otli' mechanism as just described without; swinging the shipper rod sufficiently to disconnect the belt and stop the machine.

ll' hen the detent 20 drops into engagementwith the top surface of the dog 23 it will engage in the depression 3h therein.

The top surfaceof dog 23 being curved upwardly at the rear of depression 30 into boss 29 the detent 20 will not ride over the top surface of the dog 23 as the disk revolves under the influence of the front drivi'i'ig roll but will force the dog 23 back against the action of spring 25 until the dog contacts with the edge of the recess 22, and is thereby held against further motion in this di rection. Further retraction of dog being impossible the detent 20 will ride over the boss 99 until it engages the circun'lil erence of the disk beyond the recess 22. At this moment the dog 23 being released from pressure by the detent 20 will, under the inthc ence of spring 25, spring back to its original position covering slot 17 at the front and ready to co-operate with detent 20 to stop the machine when the disk 15 has made another complete revolution. By retracting the dog to the full limit of recess 22 the full benefit is derived from the maxinunn compression of spring 25 to return the dog to its original position against any resistance due to the presence of lint, dirt or other extraneous matter.

By disconnecting gear it) from engagement with worm 9 the machine can be operated without actuating the knocleotf mechanism.

It will be noted that the machine can be started and stopped by hand from the shipper handle without any reference to the knock-off mechanism just described, the motion of the shipper rod being independent of the motion of the latch rod. This feature is useful when it is desired to stop the machine before the predertermined yardage has been delivered; for instance, at noon time or at night. This feature is common to many lniock-olf mechanisms, and we do not intend to claim it as a part of our invention.

What we claim is:

l. in a machine of the character described, the combination of a shipper a delivery roll and knoclcotl' mechanism comprising a movahly n'iounted element, means for positively moving said element in definite relation to the speed of rotation of said delivery roll, a slotin said movable element a knock-elf controlling element normally engaging said movably mounted element, a spring actuated latch rod, means for locking said latch rod against movement, means for simultane ously engaging: said knock-oil controlling element in said slot and rendering said lock ing means ino iierativc whereby the machine is stopped when the roll has made a predetermineifl number of I'QYUlUlLlUUS,

.2. in a machine of the character descrihcih the combination of a shipper, a delivery rolL and knock-oft mechanisn'i coi'nprisinga revolving dislc a slot in said dish means for revolving said disk in definite relation to the speed of the delivery rolh a lever pivoted to engage said dish as it revolves whereby said lever will en; in said slot when they are in alignunenty means for actuating said shipper when said leveoengagres in I'iltl slot, and n'ieans controlled by said lever for loci;- ing said shipper actuating means H-gtlllltit motion until s i lever engages in said slot.

ll. In a machine of the character described. the combination of a shipper; and knockoff mechaniznn (,Olllljil'iSlDQj a dish having a slot a movable element norn'ially covering one side of said sloti a pivoted lever with a detent engaging said diskn means for revolvinc said disk whereby said detent engages said element to uncover said slot as the detent and slot approach a position of alignment means for engaging and holding said deteutiu said slot when they are in align ment, and means for auttnualically act-nah ing the shipper to stop the machine when the detent and slot come into locking engagement.

t. in a knock-otii' mechanism for machines of the character described, a disk, a slot in the circumference of said disk, a knock-off lever having a detent to engage said disk, a revolvably mounted spring pressed dog normally covering one side of said slot and having a projection on its top face, means for revolving said disk whereby said detent engages said projection to move said dog to uncover said slot and permit said detent to engage in said slot, and means which auto matically stop the machine when said detent is engaged in said slot.

5. In a kno-cleoli mechanism for machines of the character described, a pivoted knockoff lever, a shipper rod, a latch rod in engagement therewith and having a shoulder, a latch lever pivoted at one end and connected near the opposite end by intcrmediate mechanism to the tree end of said knockoff lever, a latch carried by said latch lever to engage the shoulder of the latch rod, means for moving said knock-oil lever from its normal position at a predetermined inomcnt in the operation of the machine whereby said latch lever will be swung on its pivot to unlock the latch rod and stop the machine.

6. In a knock-ofl' mechanism for machines of the character described, a shipper rod, a latch rod in engagement with said shipper rod and having a cut-away portion and shoulder at one end, a pivoted latch lever, a pivoted knock-0ft lever, mechanism connect ing said latch lever with said knock-off l'ever whereby the latch lever and knock-ot'f lever will move in unison, a weight suspended from said latch lever, a latch carried by said latch lever to engage the shoulder on the latch rod, means for norn'ially holding said knock-oil lever from motion against the pull of said weight whereby said latch lever will hold said latch in locking engagement with the shoulder on the latch rod during the normal operation of the machine, means whereby said knock-off lever is instantane ously released and permitted to swing on its pivot at a predetermined moment in the operation of the machine whereby said latch lever swings on its pivot and unlocks said latch rod, which moves said shipper rod to stop the machine.

7. In a knock-off mechanism for machines of the character described, a disk with a slot and a recess adjacent said slot, a spring pressed dog in said recess and normally covering one side of said slot, a knock-off lever pivoted adjacent to and having a detent engaging the disk, means for revolving the disk whereby said detent engages the dog to uncover the slot when the detent and slot approach alignment, permitting the detent to engage in the slot when the two are in alignment, and means which stop the machine when the detent engages in the slot.

8. In a knock-oti' mechanism for machines of the character described, a disk having a slot and a recess adjacent said slot, a spring pressed dog pivoted in said recess, the top face of said dog having a raised portion projecting above the circumference of the disk, a depression and a boss, as and for the purpose described.

in a machine of the character described, a hank clock, a disk revolvably mounted in said clock, a radial slot in said dis a recess in the face of said disk adjacent said slot, a dog movable in said recess and normally covering one side of said slot, a lever pivoted in said clock adjacent said disk and having a detent normally in engagement with the circumference of said disk whereby as said disk revolves said detent engages said dog to uncover said slot as the detentand slot approach alignment, means for engaging said detent in said slot when they are in alignment, and means which automatically stop the machine when the detent engages in the slot.

10. In a knock-oft mechanism for machines of the character described, a disk, a slot in the circun'iference of said disk, 21 k ock-oti' lever having a detent to engage said disk, a recess in said disk, a dog in said recess normally covering one side of said slot, and having a projection on its top face, means for revolving said disk, whereby said detent engages said projection to nove said dog to uncover said slot and permit said detent to engage in said slot, means to engage said detent in said slot and means which automatically stop the machine when said detent is engaged in said slot.

11. In a knock-elf mechanism for ma chines of the character described, a revolving disk having a slot and a recess, a dog mounted in said recess and normally covering said slot at one side thereof, a knock-off lever pivoted adjacent said disk and having a detent to engage the circumferential surface of said disk, the engaging face of said detent having undercut surfaces at an angle to the circumference of the disk and pointing in opposite directions, the lower edge of one surface engaging the circumference of the disk, the lower edge of. the other surface being out of. engagement with the circumference of the disk but positioned to engage said dog when the detent and slot approach alignment, and to move said dog to uncover said slot, whereby said detent may engage in said slot when the said disk engaging edge of the detent passes the edge of the slot, and means which stop the machine when said detent engages in said slot.

12. In a machine of the character described, a shipper rod, a spring pressed latch llltl rod, latch rod controlling and locking mechanism, means to actuate said mechanism to unlock the latch rod, means for restraining any actuation of said mechanism during the normal operation of the machine, and means for instantaneously permitting the actuation oil said mechanism at a pre detern'iined time in the operation oi the n'iachine whereby the latch rod is unlocked and actuated by its spring to move the shipper rod to stop the machine.

13. in a knock-oil mechanism for machines oi? the character described, a shipper rod, a latch rod, a latch lever carrying a latch which normally engages the latch rod and locks it from motion, a knock-oil lever, connecting mecluinism between the latch lever and the knocleoil' lover, a weight de pending from said connecting mechanism, mechanism which. engages said knock-oil lever and normally holds itfrom motion against the pull of said weight and which at a predetermined moment in the operation oi said machine permits said knock-oil lever to be instantaneously actuated by said weight, thereby moving said latch leve and unlocking said latch rod to stop the machine.

14-. In a lrnocleolli mechanism for machines of the character described, a shipper rod, a latch rod with a shoulder, a latch lever mirryiug a latch which normally engages said shoulder to lock the latch rod against motion, a knock-oil lever, mecha: IllSill connecting said latch lever and said knock-ell lever whereby the two will move in unison, a weight depending from the end of said latch lever, revolving mechanism which engages said knock-oil? lever and nor mally holds it from motion against the pull of said weight, and which at a predetermined moment in the operation of said machine will release said knoclr-otl' lever and permit it to be instantaneously actuated by said weight, thereby actuating said latch lever, unlocking said latch from said shoulder and releasing said latch rod to stop the machine.

15. In a knock-off mechanism for machines of the character described, a pivoted knock-off lever, a shipper rod, a latch rod in engagement therewith and having a shoulder, a latch lever pivoted at one end and connected near the opposite end by intermediate mechanism to the free end of said knock-off lever, a latch carried by said latch lever to engage the shoulder on said latch rod, a cam-faced slide carried by said shipper rod in a position to engage the free one of said latch lever, means for moving said knock-off lever from its normal position at a predetermined moment in the operation of the machine whereby said latch lever will he swung on its pivot to unlock the latch rod and stop the machine, and

means for moving the shipper rod to start the machine whereby the cam face on said slide engages said latch lever to return said latch lever and knock-chi lever to normal position.

iii. In a l-IIIOUlI-Oil mechanism for machines oi the character described, a shipper handle, a shipper rod, a latch rod in engagement with said shipper rod and having a cut-away portion and shoulder at one end, a pivoted latch lever, a cam faced slide carried by said shipper rod in position to engage said latch lever, a pivoted linocleoiti lever, mechanism connecting said latch lever with said knock-oil lever whereby the latch lever and knock-oil lever will move in unison, a weight suspended from said latch lever, a latch carried by the latch lever to engage the shoulder on the latch rod, means for normally holding said knocleotl lever from motion against the pull of said weight whereby said latch lever will hold said latch in lo :lriug engagement with the shoulder on the latch rod during the normal operation of the machine, means whereby said knockell. lever is instantaneously released and permitted to swing on its pivot at a predetermined moment in the operation oi the machine whereby said latch lever swings on its pivot and unlocks said. latch rod which n'oves said shipper rod' to stop the machine.

1i. lln a knock-oil mechanism for machines ot the character described, a latch rod having a shoulder, a latch lever carrying a latch to engage said shoulder and lock said latch rod, a shipper rod, a cam faced slide carried by said shipper rod in a position to engage said latch lever, whereby the movement of the shipper rod to start the machine will engage the cam face on the slide with the latch lever, swing said lever on its pivot, and carry said latch into looking engagement with the shoulder on the latch rod.

18.111 a knock-oft mechanism for ma chines of the character described, a latch rod having a shoulder, a latch lever carrying a latch to engage said shoulder and lock said latch rod against motion, a shipper rod, a cam faced slide carried by said shipper rod in a position to engage said latch lever, an auxiliary spring on said shipper rod, whereby when the shipper rod is moved to start the machine the cam face on the slide will engage and swing the latch lever. carrying said latch into locking engagement with said latch rod and whereby when the shipper rod is released the auxiliary spring will move said shipper rod a small distance in the opposite direction and thereby remove said cam face on the slide from engagement with the latch lever.

19. In a machine of the character described, the combination of a shipper rod,

lit)

a spring actuated latch rod, locking means for locking said latch rod from motion, and mechanism controlling said locking means comprising a rotatable disk having a slot therein, a lever positioned to engage said disk and enter said slot when said lever and slot are in alignment, and means connecting said lever and said locking means whereby saidloeking means Will be held in operative position by said lever until said lever enters said slot and will then be rendered inoperative, releasing the latch rod to be actuated by its spring to move the shipper rod to stop the machine.

20. In a machine of the character described, a latch rod having a recess therein, a latch lever having a latch to engage in saidrecess, means for positively restraining said latch from any retraction during the 20 normal operation of the machine, and means for instantaneously disengaging said latch from said recess When a predetermined yardage of yarn has been delivered by the machine.

21. In a knock-oil mechanism for machines of the character described, a latch rod, a latch lever for locking said rod from motion to stop the machine, means Which positively restrain said latch lever from any motion during the operation of the machine, and means which instantaneously actuate said latch lever at a predetermined moment in the operation of the machine whereby said latch lever is unlocked and porn ted to stop the machine.

In Witness whereof We have signed our names to the foregoing specification.

SERGE DANILOFF. CHARLES FRANKLIN DUPEE. 

